Pretty cool site. There is the issue of random matches not weeding out movies that are good but not great... aka - Interview With a Vampire was number 2 on my list forever because it kept versing movies like Little Nicky! Once you've done it enough, limit the matches to top 100, and then top 50, and then top 20.
Lion King, Tenenbaums, Usual Suspects, Amadeus, and Nightmare Before Christmas are all in my top ten, which they would probably be top five, so it's getting darn close.
It gets hard when you have to choose between LOTR movies or Godfather 1 vs 2. Fun site.